Installing the JCE

The JCE (Java Cryptography Extension) is a set of optional packages for JDK 1.2.x and JDK 1.3.x that provides classes for encryption, key generation and key agreement. The JCE is necessary only if you are using the Sftp class with a JDK prior to JDK 1.4.

Download the JCE

The first step in installing the JCE is to download the optional JCE package provided for JDK versions 1.2.x and 1.3.x.

http://java.sun.com/products/jce/index-122.html

Install the JCE jar files

After downloading the JCE extract the contents of the package to a directory on your system. In the lib directory of this package you will find the files jce1_2_2.jar, local_policy.jar, sunjce_provider.jar and US_export_policy.jar files. Copy these files to your <java-home>/lib/ext directory e.g. C:\jdk1.2.2\jre\lib\ext.

In your <java-home>/lib/security/java.security file you should find a section that lists the security providers and their preference.

Example

# List of providers and their preference orders (see above):

security.provider.1=sun.security.provider.Sun

Update this section registering the com.sun.crypto.provider.SunJCE class as a provider.

Example

# List of providers and their preference orders (see above):

security.provider.1=sun.security.provider.Sun

security.provider.2=com.sun.crypto.provider.SunJCE

Update your policy file

In your <java-home>/lib/security/java.policy file add the following statement (this may already exist in some JDK installations) so that the installed extensions may be accessed by the JDK.

// Standard extensions get all permissions by default

grant codeBase "file:${java.home}/lib/ext/*" {

permission java.security.AllPermission;

};